Vehicle liftgate



FIG. 1 is a front and left perspective view of a vehicle liftgate showing my new design;

FIG. 2 is a front elevation view of the vehicle liftgate of FIG. 1;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a right elevation view thereof; and,

FIG. 5 is a top view thereof.

The broken lines in the drawings depict portions of the vehicle liftgate that form no part of the claimed design. 

CLAIM The ornamental design for a vehicle liftgate, as shown and described. 